diff --git a/xCAT-server/lib/xcat/plugins/vbox.pm b/xCAT-server/lib/xcat/plugins/vbox.pm
index be6578034..a4d05e79c 100644
--- a/xCAT-server/lib/xcat/plugins/vbox.pm
+++ b/xCAT-server/lib/xcat/plugins/vbox.pm
@@ -46,7 +46,7 @@ sub handled_commands
 
 =head3	preprocess_request
 
-  Check and setup for hierarchy 
+  Check and setup for hierarchy
 
 =cut